Have you considered that maybe *you* lack the innate frequencies to detect what else is there, resulting in your perception of "same beat" and "Hemingway but worse?"
Yes, there's a beat, but I would bet you don't actually sense much of it. Your tweet beats to the same drum as so many I've read. And it's not the beat that thrums through AI text, but the echo of the human reaction to the human reaction to the human reaction to AI. That's the true echo chamber that's making you bland.